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  <title>表达式</title>
  <script type="text/javascript">
    var num1 = 5;
    var num2 = 6;
    document.write("小明还剩:" + num1 + "元" + "<br>");
    document.write("小红花:" + num2 + "元买个铅笔盒");
  </script>
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<body>
</body>

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